[ENHANCEMENT] Captcha cache in Redis (maybe even stats in Redis?)

**Describe the feature you'd like to have implemented**
It would be nice to have a command or Java code API means to enable "protection" on a server.

**Is your feature request related to an existing problem? Please describe.**
Right now I have around 8 velocity instances. Using `filter-toggle` options is not really beneficial since under normal loads we have 8 Connections per second to frontend, and less than 1 connection per second on each instance. I could setup it in a way to be enabled on a slightest load change but our project has a "wipe every n days" kind of gameplay. So essentially players log in all at once one time in two weeks or so. Enabling captcha at this time is undesirable.

I am aware of `/bf reload` command, but I just don't want to redact configs on all 8 instances :9

**Additional context**
Command would be enough for me personally and there is no need for full featured API.